Stellar-activity of late-type stars (Strassmeier+ 2000)

Details Stellar-activity of late-type stars (Strassmeier+ 2000) Stellar-activity of late-type stars (Strassmeier+ 2000)

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..41420275s&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/142/275. Originally published in: 2000A&AS..142..275S

Physics

Stars: Late-Type, Parallaxes: Trigonometric, Radial Velocities, Equivalent Widths, Rotational Velocities

Scientific paper

We present the results from a spectroscopic Ca II H&K survey of 1058 late-type stars selected from a color-limited subsample of the Hipparcos (Cat. ) catalog. Out of these 1058 stars, 371 stars were found to show significant H&K emission, most of them previously unknown; 23% with strong emission, 36% with moderate emission, and 41% with weak emission. These spectra are used to determine absolute H&K emission-line fluxes, radial velocities, and equivalent widths of the luminosity-sensitive Sr II line at 4077Å. Red-wavelength spectroscopic and Stroemgren y photometric follow-up observations of the 371 stars with H&K emission are used to additionally determine the absolute Hα-core flux, the lithium abundance from the Li I 6708Å equivalent width, the rotational velocity vsini, the radial velocity, and the light variations and its periodicity. (3 data files).